Improvement in street-lamps



Z'Sheets--Sheet1..

M'llCHAEL B. DYOTT.

Street Lamp.v

N0. 124,673. Ptented March1"9,11872.

INVE NTOR:

n 2Sheets-Sheet2 MICHAEL B.DY0TT.

Street Lari-1p.

N0T 124,673, i PatentedMarchg,1872.

WITNESSES ...INVE MWL APIE 'r f IMPROVEMENT IN STREET-LAMPS.

Specification forming part of Letters Patent No. 124,673, dated March 19, 1872.

Specification l describing certain Improvements in Lanterns, invented by MICHAEL B. DYOTT, of the city of Philadelphia, in the State of Pennsylvania.

My improvements relate more especially to the street-lantern with elevated fountain for hydrocarbon liquid, for certain improvements in which Letters Patent No. 119,920 were issued Vto me on the 17th day of October, 1871; and in the same lantern the first part of my invention consists of a dome of artiiicial opal, or other semitransparent and luminous material, supported in any suitable manner directly over the upper part of the lantern-globe or glass-body, so as nto leave a surrounding space between them for the upward passage of the cool external air to the eXitcap on the top of said dome 5 the object of this part of my invention being twoi'old--iirst, to protect the upper part of the globe or glass body below from being broken by falling hail, snow, or cold rain, by means of a luminous dome or top; and second, to increase the ventilation of the lantern. The second part of my invention consists in supporting the elevated 4reservoir and its socket or base upon supporting braces resting upon the frame of the lantern in such amanner that the said reservoir and socket will be maintained in their required elevated position above the dome, independently of any support from either the said dome or the glass globe below; the object of this part of my invention being to prevent the said reservoir and socket from falling, should either the dome or the glass globe below become broken from any cause. The third part of my invention consists of an insulator, of wood or other poor conductor of heat, between the bottom of the socket or base of the elevated reservoir and the top of the lantern; the object of this part of my invention being to more effectually prevent the heat of the lantern below from heating the base of the reservoir above.

Figure 1 is a central vertical section of a circular street-lantern embodying my invention. Fig. 2 is a horizontal section below the dotted line V W of Fig. 1. Fig. 3 is a modification, showing the conduit-pipe as arranged within 'anopen air'pipe fixed inside of a street-lantern.

The globe or glass body of the lantern is, in this instance, made in two distinct or separate parts, A and A', horizontally divided, the upper part resting upon the lower, and both of them supported by the collar or base B of the lantern. The cap (l is fixed with its lower end in the opening of the top of the dome D, and the latter rests upon the annular guard b', which is supported by upright bars b b that connect it firmly to the base B, so as to leave an open annular space, d', around between it and A for the entrance and free passage of the surrounding cool external air to the cap C,

through which it escapes with the heated air from the interior of the lantern. The reservoir or fountain E and its socket F are supported together, and out of contact or connection with the cap G, upon braces or bars G G, the lower ends of which latter are fixed in the guard b p and their upper ends in the metallic collar or ring g', in which the lower end of the insulator H, of wood or other poor conductor of heat, is fixed, while the upper end of said insulator enters a socket formed by a surrounding iiange, f", at the bottom of the socket F of the reser voir E, and prevents the heat of the lantern below from being transmitted to the reservoir or its socket. The conduit-pipe f( has its up per end xed in the socket F, and its lower end detachably connected to ashort projecting branch-pipe, i', of the burner I, the said pipe f passing down outside of the frame of the lantern, and is `thus prevented from being heated or even warmed by the latter. If the lantern is made with square or polygonous sides, it is intended that the conduit-pipe shall pass down through any suitably capacious pipe open at both ends and xed in one of the inside cor ners of the said lantern, so that its open ends only will communicate with the external air and thus allow the latter to pass continually through it, and consequently keep the said conduitpipe cool. The upper part A of the globe, when the latter is in two separate parts, A and A', may be made of mica, in the form of a hollow conical frustum, as indicated by the dotted lines a; in Fig. l.

l. claim as my invention l 1. The dome D, supported substantially as EEIcE.

described, in combination with the airspace d between it and the upper part A ofthe globe or glass body of the ;1antern, substantially as and for the purpose hereinbefore described and set forth.

2. Supporting the reservoir E and its socket F by means of the supporting-braces G G, or their equivalents, resting upon the frame of the lantern, substantially as and for the purpose hereinbefore described and set forth.

3. The arrangement of an insulator, H, directly between the bottom of the socket F of the reservoir E and the top or cap C of the lantern, substantially as and for the purpose hereinbefore described and set forth.

M. B. DYOTT.

Witnesses BENJ. MoRIsoN, WM. H. MoRrsoN. 

